XML 11 R1.htm IDEA: XBRL DOCUMENT v3.25.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2025
Jul. 28, 2025
Document And Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Securities Act File Number 001-38282  
Entity Registrant Name Metropolitan Bank Holding Corp.  
Entity Incorporation, State or Country Code NY  
Entity Tax Identification Number 13-4042724  
Entity Address, Address Line One 99 Park Avenue  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10016  
City Area Code 212  
Local Phone Number 659-0600  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol MCB  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   10,421,384
Entity Central Index Key 0001476034  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false